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Useful1 Signal3
The hooks worker protocol learned press messages so plugin buttons can report back.
Press and press_release plumbing plus a Button renderer exist, but nothing in the shipped UI exposes them.
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What
The hooks worker protocol now handles press and press_release messages and answers with press_result or press_error, and the plugin UI renderer maps a Button node to a component bound to its plugin, handle and label. This is plumbing for interactive plugin surfaces; nothing in the shipped UI exposes it yet.
Evidence
press_release
Strings lifted out of the shipped bundle, so the claim above can be checked against them.